Author: Rossiani Wijaya
MDL-27955 lesson module: fixed error for reviewing lesson and update string to continue or finish reviewing
http://git.moodle.org/gw?p=moodle.git;a=commit;h=57a4bd032bb8917dc8ffcae44f287ab61bfe4444
http://github.com/moodle/moodle/commit/57a4bd032bb8917dc8ffcae44f287ab61bfe4444
+ 2.1 en [continuetonextpage,mod_lesson]
+ 2.1 en [finish,mod_lesson]
+ 2.1 en [gotoendoflesson,mod_lesson]
- 2.1 en [continuetoanswer,mod_lesson]